[Git][ghc/ghc][wip/andreask/spec-pragma] 91 commits: rts/Messages: Refactor

Andreas Klebinger (@AndreasK) gitlab at gitlab.haskell.org
Sun Jan 1 11:35:30 UTC 2023 


Andreas Klebinger pushed to branch wip/andreask/spec-pragma at Glasgow Haskell Compiler / GHC


Commits:
ed056bc3 by Ben Gamari at 2022-12-16T16:12:44-05:00
rts/Messages: Refactor

This doesn't change behavior but makes the code a bit easier to follow.

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7356f8e0 by Ben Gamari at 2022-12-16T16:12:44-05:00
rts/ThreadPaused: Ordering fixes

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914f0025 by Ben Gamari at 2022-12-16T16:12:44-05:00
eventlog: Silence spurious data race

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fbc84244 by Ben Gamari at 2022-12-16T16:12:44-05:00
Introduce SET_INFO_RELEASE for Cmm

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821b5472 by Ben Gamari at 2022-12-16T16:12:44-05:00
rts: Use fences instead of explicit barriers

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2228c999 by Ben Gamari at 2022-12-16T16:12:44-05:00
rts/stm: Fix memory ordering in readTVarIO#

See #22421.

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99269b9f by Ben Gamari at 2022-12-16T16:12:44-05:00
Improve heap memory barrier Note

Also introduce MUT_FIELD marker in Closures.h to document mutable
fields.

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70999283 by Ben Gamari at 2022-12-16T16:12:44-05:00
rts: Introduce getNumCapabilities

And ensure accesses to n_capabilities are atomic (although with relaxed
ordering). This is necessary as RTS API callers may concurrently call
into the RTS without holding a capability.

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98689f77 by Ben Gamari at 2022-12-16T16:12:44-05:00
ghc: Fix data race in dump file handling

Previously the dump filename cache would use a non-atomic update which
could potentially result in lost dump contents. Note that this is still
a bit racy since the first writer may lag behind a later appending
writer.

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605d9547 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Always use atomics for context_switch and interrupt

Since these are modified by the timer handler.

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86f20258 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts/Timer: Always use atomic operations

As noted in #22447, the existence of the pthread-based ITimer
implementation means that we cannot assume that the program is
single-threaded.

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f8e901dc by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Encapsulate recent_activity access

This makes it easier to ensure that it is accessed using the necessary
atomic operations.

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e0affaa9 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Encapsulate access to capabilities array

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7ca683e4 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Encapsulate sched_state

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1cf13bd0 by Ben Gamari at 2022-12-16T16:12:45-05:00
PrimOps: Fix benign MutVar race

Relaxed ordering is fine here since the later CAS implies a release.

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3d2a7e08 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Style fix

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82c62074 by Ben Gamari at 2022-12-16T16:12:45-05:00
compiler: Use release store in eager blackholing

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eb1a0136 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Fix ordering of makeStableName

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ad0e260a by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Use ordered accesses instead of explicit barriers

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a3eccf06 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Statically allocate capabilities

This is a rather simplistic way of solving #17289.

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287fa3fb by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Ensure that all accesses to pending_sync are atomic

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351eae58 by Ben Gamari at 2022-12-16T16:12:45-05:00
rts: Note race with wakeBlockingQueue

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5acf33dd by Bodigrim at 2022-12-16T16:13:22-05:00
Bump submodule directory to 1.3.8.0 and hpc to HEAD

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0dd95421 by Bodigrim at 2022-12-16T16:13:22-05:00
Accept allocations increase on Windows

This is because of `filepath-1.4.100.0` and AFPP, causing increasing round-trips
between lists and ByteArray. See #22625 for discussion.

Metric Increase:
    MultiComponentModules
    MultiComponentModulesRecomp
    MultiLayerModules
    MultiLayerModulesRecomp
    T10421
    T10547
    T12150
    T12227
    T12234
    T12425
    T13035
    T13253
    T13253-spj
    T13701
    T13719
    T15703
    T16875
    T18140
    T18282
    T18304
    T18698a
    T18698b
    T18923
    T20049
    T21839c
    T21839r
    T5837
    T6048
    T9198
    T9961
    TcPlugin_RewritePerf
    hard_hole_fits

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ef9ac9d2 by Cheng Shao at 2022-12-16T16:13:59-05:00
testsuite: Mark T9405 as fragile instead of broken on Windows

It's starting to pass again, and the unexpected pass blocks CI.

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1f3abd85 by Cheng Shao at 2022-12-16T21:16:28+00:00
compiler: remove obsolete commented code in wasm NCG

It was just a temporary hack to workaround a bug in the relooper, that
bug has been fixed long before the wasm backend is merged.

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e3104eab by Cheng Shao at 2022-12-16T21:16:28+00:00
compiler: add missing export list of GHC.CmmToAsm.Wasm.FromCmm

Also removes some unreachable code here.

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1c6930bf by Cheng Shao at 2022-12-16T21:16:28+00:00
compiler: change fallback function signature to Cmm function signature in wasm NCG

In the wasm NCG, when handling a `CLabel` of undefined function
without knowing its function signature, we used to fallback to `() ->
()` which is accepted by `wasm-ld`. This patch changes it to the
signature of Cmm functions, which equally works, but would be required
when we emit tail call instructions.

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8a81d9d9 by Cheng Shao at 2022-12-16T21:16:28+00:00
compiler: add optional tail-call support in wasm NCG

When the `-mtail-call` clang flag is passed at configure time, wasm
tail-call extension is enabled, and the wasm NCG will emit
`return_call`/`return_call_indirect` instructions to take advantage of
it and avoid the `StgRun` trampoline overhead.

Closes #22461.

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d1431cc0 by Cheng Shao at 2022-12-17T08:07:15-05:00
base: add missing autoconf checks for waitpid/umask

These are not present in wasi-libc. Required for fixing #22589

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da3f1e91 by Cheng Shao at 2022-12-17T08:07:51-05:00
compiler: make .wasm the default executable extension on wasm32

Following convention as in other wasm toolchains. Fixes #22594.

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ad21f4ef by Cheng Shao at 2022-12-17T08:07:51-05:00
ci: support hello.wasm in ci.sh cross testing logic

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6fe2d778 by amesgen at 2022-12-18T19:33:49-05:00
Correct `exitWith` Haddocks

The `IOError`-specific `catch` in the Prelude is long gone.

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b3eacd64 by Ben Gamari at 2022-12-18T19:34:24-05:00
rts: Drop racy assertion

0e274c39bf836d5bb846f5fa08649c75f85326ac added an assertion in
`dirty_MUT_VAR` checking that the MUT_VAR being dirtied was clean.
However, this isn't necessarily the case since another thread may have
raced us to dirty the object.

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761c1f49 by Ben Gamari at 2022-12-18T19:35:00-05:00
rts/libdw: Silence uninitialized usage warnings

As noted in #22538, previously some GCC versions warned that various
locals in Libdw.c may be used uninitialized. Although this wasn't
strictly true (since they were initialized in an inline assembler block)
we fix this by providing explicit empty initializers.

Fixes #22538
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5e047eff by Matthew Pickering at 2022-12-20T15:12:04+00:00
testsuite: Mark T16392 as fragile on windows

See #22649

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703a4665 by M Farkas-Dyck at 2022-12-20T21:14:46-05:00
Scrub some partiality in `GHC.Cmm.Info.Build`: `doSRTs` takes a `[(CAFSet, CmmDecl)]` but truly wants a `[(CAFSet, CmmStatics)]`.

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9736ab74 by Matthew Pickering at 2022-12-20T21:15:22-05:00
packaging: Fix upload_ghc_libs.py script

This change reflects the changes where .cabal files are now generated by
hadrian rather than ./configure.

Fixes #22518

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7c6de18d by Ben Gamari at 2022-12-20T21:15:57-05:00
configure: Drop uses of AC_PROG_CC_C99

As noted in #22566, this macro is deprecated as of autoconf-2.70
`AC_PROG_CC` now sets `ac_cv_prog_cc_c99` itself.

Closes #22566.

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36c5d98e by Ben Gamari at 2022-12-20T21:15:57-05:00
configure: Use AS_HELP_STRING instead of AC_HELP_STRING

The latter has been deprecated.

See #22566.

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befe6ff8 by Bodigrim at 2022-12-20T21:16:37-05:00
GHCi.UI: fix various usages of head and tail

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666d0ba7 by Bodigrim at 2022-12-20T21:16:37-05:00
GHCi.UI: avoid head and tail in parseCallEscape and around

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5d96fd50 by Bodigrim at 2022-12-20T21:16:37-05:00
Make GHC.Driver.Main.hscTcRnLookupRdrName to return NonEmpty

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3ce2ab94 by Bodigrim at 2022-12-21T06:17:56-05:00
Allow transformers-0.6 in ghc, ghci, ghc-bin and hadrian

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954de93a by Bodigrim at 2022-12-21T06:17:56-05:00
Update submodule haskeline to HEAD (to allow transformers-0.6)

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cefbeec3 by Bodigrim at 2022-12-21T06:17:56-05:00
Update submodule transformers to 0.6.0.4

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b4730b62 by Bodigrim at 2022-12-21T06:17:56-05:00
Fix tests

T13253 imports MonadTrans, which acquired a quantified constraint in transformers-0.6, thus increase in allocations

Metric Increase:
    T13253

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0be75261 by Simon Peyton Jones at 2022-12-21T06:18:32-05:00
Abstract over the right free vars

Fix #22459, in two ways:

(1) Make the Specialiser not create a bogus specialisation if
    it is presented by strangely polymorphic dictionary.
    See Note [Weird special case in SpecDict] in
    GHC.Core.Opt.Specialise

(2) Be more careful in abstractFloats
    See Note [Which type variables to abstract over]
    in GHC.Core.Opt.Simplify.Utils.

So (2) stops creating the excessively polymorphic dictionary in
abstractFloats, while (1) stops crashing if some other pass should
nevertheless create a weirdly polymorphic dictionary.

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df7bc6b3 by Ying-Ruei Liang (TheKK) at 2022-12-21T14:31:54-05:00
rts: explicitly store return value of ccall checkClosure to prevent type error (#22617)

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e193e537 by Simon Peyton Jones at 2022-12-21T14:32:30-05:00
Fix shadowing lacuna in OccurAnal

Issue #22623 demonstrated another lacuna in the implementation
of wrinkle (BS3) in Note [The binder-swap substitution] in
the occurrence analyser.

I was failing to add TyVar lambda binders using
addInScope/addOneInScope and that led to a totally bogus binder-swap
transformation.

Very easy to fix.

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3d55d8ab by Simon Peyton Jones at 2022-12-21T14:32:30-05:00
Fix an assertion check in addToEqualCtList

The old assertion saw that a constraint ct could rewrite itself
(of course it can) and complained (stupid).

Fixes #22645

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ceb2e9b9 by Ben Gamari at 2022-12-21T15:26:08-05:00
configure: Bump version to 9.6

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fb4d36c4 by Ben Gamari at 2022-12-21T15:27:49-05:00
base: Bump version to 4.18

Requires various submodule bumps.

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93ee7e90 by Ben Gamari at 2022-12-21T15:27:49-05:00
ghc-boot: Fix bootstrapping

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fc3a2232 by Ben Gamari at 2022-12-22T13:45:06-05:00
Bump GHC version to 9.7

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914f7fe3 by Andreas Klebinger at 2022-12-22T23:36:10-05:00
Don't consider large byte arrays/compact regions pinned.

Workaround for #22255 which showed how treating large/compact regions
as pinned could cause segfaults.

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32b32d7f by Matthew Pickering at 2022-12-22T23:36:46-05:00
hadrian bindist: Install manpages to share/man/man1/ghc.1

When the installation makefile was copied over the manpages were no
longer installed in the correct place. Now we install it into share/man/man1/ghc.1
as the make build system did.

Fixes #22371

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b3ddf803 by Ben Gamari at 2022-12-22T23:37:23-05:00
rts: Drop paths from configure from cabal file

A long time ago we would rely on substitutions from the configure script
to inject paths of the include and library directories of libffi and
libdw. However, now these are instead handled inside Hadrian when
calling Cabal's `configure` (see the uses of `cabalExtraDirs` in
Hadrian's `Settings.Packages.packageArgs`).

While the occurrences in the cabal file were redundant, they did no
harm. However, since b5c714545abc5f75a1ffdcc39b4bfdc7cd5e64b4 they have
no longer been interpolated. @mpickering noticed the suspicious
uninterpolated occurrence of `@FFIIncludeDir@` in #22595,
prompting this commit to finally remove them.

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b2c7523d by Ben Gamari at 2022-12-22T23:37:59-05:00
Bump libffi-tarballs submodule

We will now use libffi-3.4.4.

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3699a554 by Alan Zimmerman at 2022-12-22T23:38:35-05:00
EPA: Make EOF position part of AnnsModule

Closes #20951
Closes #19697

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99757ce8 by Sylvain Henry at 2022-12-22T23:39:13-05:00
JS: fix support for -outputdir (#22641)

The `-outputdir` option wasn't correctly handled with the JS backend
because the same code path was used to handle both objects produced by
the JS backend and foreign .js files. Now we clearly distinguish the
two in the pipeline, fixing the bug.

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02ed7d78 by Simon Peyton Jones at 2022-12-22T23:39:49-05:00
Refactor mkRuntimeError

This patch fixes #22634.  Because we don't have TYPE/CONSTRAINT
polymorphism, we need two error functions rather than one.

I took the opportunity to rname runtimeError to impossibleError,
to line up with mkImpossibleExpr, and avoid confusion with the
genuine runtime-error-constructing functions.

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35267f07 by Ben Gamari at 2022-12-22T23:40:32-05:00
base: Fix event manager shutdown race on non-Linux platforms

During shutdown it's possible that we will attempt to use a closed fd
to wakeup another capability's event manager. On the Linux eventfd path
we were careful to handle this. However on the non-Linux path we failed
to do so. Fix this.

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317f45c1 by Simon Peyton Jones at 2022-12-22T23:41:07-05:00
Fix unifier bug: failing to decompose over-saturated type family

This simple patch fixes #22647

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14b2e3d3 by Ben Gamari at 2022-12-22T23:41:42-05:00
rts/m32: Fix sanity checking

Previously we would attempt to clear pages which were marked as
read-only. Fix this.

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16a1bcd1 by Matthew Pickering at 2022-12-23T09:15:24+00:00
ci: Move wasm pipelines into nightly rather than master

See #22664 for the changes which need to be made to bring one of these
back to the validate pipeline.

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18d2acd2 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Fix race in marking of blackholes

We must use an acquire-fence when marking to ensure that the indirectee
is visible.

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11241efa by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Fix segment list races

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602455c9 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Use atomic when looking at bd->gen

Since it may have been mutated by a moving GC.

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9d63b160 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Eliminate race in bump_static_flag

To ensure that we don't race with a mutator entering a new CAF we take
the SM mutex before touching static_flag. The other option here would be
to instead modify newCAF to use a CAS but the present approach is a bit
safer.

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26837523 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Ensure that mutable fields have acquire barrier

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8093264a by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Fix races in collector status tracking

Mark a number of accesses to do with tracking of the status of the
concurrent collection thread as atomic. No interesting races here,
merely necessary to satisfy TSAN.

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387d4fcc by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Make segment state updates atomic

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543cae00 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Refactor update remembered set initialization

This avoids a lock inversion between the storage manager mutex and
the stable pointer table mutex by not dropping the SM_MUTEX in
nonmovingCollect. This requires quite a bit of rejiggering but it
does seem like a better strategy.

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c9936718 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Ensure that we aren't holding locks when closing them

TSAN complains about this sort of thing.

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0cd31f7d by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Make bitmap accesses atomic

This is a benign race on any sensible hard since these are byte
accesses. Nevertheless, atomic accesses are necessary to satisfy
TSAN.

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d3fe110a by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Fix benign race in update remembered set check

Relaxed load is fine here since we will take the lock before looking at
the list.

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ab6cf893 by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Fix race in shortcutting

We must use an acquire load to read the info table pointer since if we
find an indirection we must be certain that we see the indirectee.

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36c9f23c by Ben Gamari at 2022-12-23T19:09:30-05:00
nonmoving: Make free list counter accesses atomic

Since these may race with the allocator(s).

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aebef31c by doyougnu at 2022-12-23T19:10:09-05:00
add GHC.Utils.Binary.foldGet' and use for Iface

A minor optimization to remove lazy IO and a lazy accumulator

strictify foldGet'

IFace.Binary: use strict foldGet'

remove superfluous bang

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5eb357d9 by Ben Gamari at 2022-12-24T00:41:05-05:00
compiler: Ensure that GHC toolchain is first in search path

As noted in #22561, it is important that GHC's toolchain look
first for its own headers and libraries to ensure that the
system's are not found instead. If this happens things can
break in surprising ways (e.g. see #22561).

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cbaebfb9 by Matthew Pickering at 2022-12-24T00:41:40-05:00
head.hackage: Use slow-validate bindist for linting jobs

This enables the SLOW_VALIDATE env var for the linting head.hackage
jobs, namely the jobs enabled manually, by the label or on the nightly
build now use the deb10-numa-slow-validate bindist which has assertions
enabled.

See #22623 for a ticket which was found by using this configuration
already!

The head.hackage jobs triggered by upstream CI are now thusly:

hackage-lint: Can be triggered on any MR, normal validate pipeline or nightly build.
              Runs head.hackage with -dlint and a slow-validate bindist

hackage-label-lint: Trigged on MRs with "user-facing" label, runs the slow-validate
                    head.hackage build with -dlint.

nightly-hackage-lint: Runs automatically on nightly pipelines with slow-validate + dlint config.

nightly-hackage-perf: Runs automaticaly on nightly pipelines with release build and eventlogging enabled.

release-hackage-lint: Runs automatically on release pipelines with -dlint on a release bindist.

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f4850f36 by Matthew Pickering at 2022-12-24T00:41:40-05:00
ci: Don't run abi-test-nightly on release jobs

The test is not configured to get the correct dependencies for the
release pipelines (and indeed stops the release pipeline being run at
all)

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c264b06b by Matthew Pickering at 2022-12-24T00:41:40-05:00
ci: Run head.hackage jobs on upstream-testing branch rather than master

This change allows less priviledged users to trigger head.hackage jobs
because less permissions are needed to trigger jobs on the
upstream-testing branch, which is not protected.

There is a CI job which updates upstream-testing each hour to the state
of the master branch so it should always be relatively up-to-date.

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63b97430 by Ben Gamari at 2022-12-24T00:42:16-05:00
llvmGen: Fix relaxed ordering

Previously I used LLVM's `unordered` ordering for the C11 `relaxed`
ordering. However, this is wrong and should rather use the LLVM
`monotonic` ordering.

Fixes #22640
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f42ba88f by Ben Gamari at 2022-12-24T00:42:16-05:00
gitlab-ci: Introduce aarch64-linux-llvm job

This nightly job will ensure that we don't break the LLVM backend on
AArch64/Linux by bootstrapping GHC.

This would have caught #22640.

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6d62f6bf by Matthew Pickering at 2022-12-24T00:42:51-05:00
Store RdrName rather than OccName in Holes

In #20472 it was pointed out that you couldn't defer out of scope but
the implementation collapsed a RdrName into an OccName to stuff it into
a Hole. This leads to the error message for a deferred qualified name
dropping the qualification which affects the quality of the error
message.

This commit adds a bit more structure to a hole, so a hole can replace a
RdrName without losing information about what that RdrName was. This is
important when printing error messages.

I also added a test which checks the Template Haskell deferral of out of
scope qualified names works properly.

Fixes #22130

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3c3060e4 by Richard Eisenberg at 2022-12-24T17:34:19+00:00
Drop support for kind constraints.

This implements proposal 547 and closes ticket #22298.
See the proposal and ticket for motivation.

Compiler perf improves a bit

Metrics: compile_time/bytes allocated
-------------------------------------
  CoOpt_Singletons(normal)   -2.4% GOOD
            T12545(normal)   +1.0%
            T13035(normal)  -13.5% GOOD
            T18478(normal)   +0.9%
            T9872d(normal)   -2.2% GOOD

                 geo. mean   -0.2%
                 minimum    -13.5%
                 maximum     +1.0%

Metric Decrease:
    CoOpt_Singletons
    T13035
    T9872d

- - - - -
6d7d4393 by Ben Gamari at 2022-12-24T21:09:56-05:00
hadrian: Ensure that linker scripts are used when merging objects

In #22527 @rui314 inadvertantly pointed out a glaring bug in Hadrian's
implementation of the object merging rules: unlike the old `make` build
system we utterly failed to pass the needed linker scripts. Fix this.

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a5bd0eb8 by Bodigrim at 2022-12-24T21:10:34-05:00
Document infelicities of instance Ord Double and workarounds

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18f2c302 by Andreas Klebinger at 2023-01-01T12:34:04+01:00
Allow combination of NOINLINE/INLINEABLE.

We do this by also tracking INLINEABLE outside of the Unfolding data
type as it's own flag.

In the proccess of this I made a few other smaller changes.

* Allow NOINLINE bindings to specialise with -fspecialise-aggressively.
  Fixes #21036
* Made rule source a proper type instead of Bool.

-------------------------
Metric Decrease:
    T14766
    T18304
Metric Increase:
    T10359
    T13386
    T15263
-------------------------

- - - - -


30 changed files:

- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/gen_ci.hs
- .gitlab/jobs.yaml
- .gitlab/upload_ghc_libs.py
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Cmm.hs
- compiler/GHC/Cmm/Info/Build.hs
- compiler/GHC/Cmm/Pipeline.hs
- compiler/GHC/CmmToAsm.hs
- compiler/GHC/CmmToAsm/Wasm.hs
- compiler/GHC/CmmToAsm/Wasm/Asm.hs
- compiler/GHC/CmmToAsm/Wasm/FromCmm.hs
- compiler/GHC/CmmToAsm/Wasm/Types.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Opt/CSE.hs
- compiler/GHC/Core/Opt/ConstantFold.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Rules.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7bbf5784303adbb752317f8a4062cd048e9b8651...18f2c302045fa26af9bb9d6be94dd56904a0f8f1

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7bbf5784303adbb752317f8a4062cd048e9b8651...18f2c302045fa26af9bb9d6be94dd56904a0f8f1
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